Ammonoides du Permien, provinces du Hunan et du Guangdong nordZHENG ZHUO-GUAN.Gǔshēngwùxué bào. 1984, Vol 23, Num 2, pp 185-195, issn 0001-6616Article

XENODISCACEAN AMMONOIDS AND THEIR BEARING ON THE DISCRIMINATION OF THE PERMO-TRIASSIC BOUNDARY.TOZER ET.1969; GEOL. MAG.; GBR; 1969(8), VOL. 106, NUM. 0004, P. 348 A 361Miscellaneous

XENODISCACEAN AMMONOIDS AND THEIR BEARING ON THE DISCRIMINATION OF THE PERMO-TRIASSIC BOUNDARY.TOZER ET.1969; GEOL. MAG.; GBR; 1969(8), VOL. 106, NUM. 0004, P. 348 A 361Miscellaneous